| abstract |
Provided is a grease composition that exhibits excellent peeling resistance even when used in an environment where water is mixed, and has excellent heat resistance. Also provided are a rolling bearing and a wheel-supporting rolling bearing device that have a long life even when used in an environment where water is mixed or in a high temperature environment. A rolling bearing device for supporting a wheel includes a hub, an inner ring, an outer ring, two rows of rolling elements, and a grease composition filled in an internal space. Yes. This grease composition contains a thermal conductivity improver and a urea compound as a thickener. And content of a thickener is 5 to 30 mass% of the whole grease composition. [Selection] Figure 1 |